@red:red;
html,body{
    margin: 0;
    padding: 0;
  }
.t-red{
    color:red;
    font-size: 20px;
}
.btn{
    padding: 4px 10px;
    cursor: pointer;
    border-radius: 4px;
    border: 1px solid #bebebe;
    display: inline-block;
    transform: all 0.3s;
    &:hover{
        color:blue
    }
}